Museo Thyssen-Bornemisza, Madrid

Concierge.com's insider take:

The collection of old masters and major 19th- and 20th-century works amassed by the late Baron Hans Heinrich Thyssen-Bornemisza has graced Madrid since 1992. In summer 2004, a five-story, 250,000-square-foot addition by the Barcelona architects BOPBAA opened, making room for some 200 more pieces from the collection of the Baron's widow, Carmen Thyssen-Bornemisza. These include canvases by Hopper, O'Keeffe, Kirchner, Kandinsky, Picasso, Fragonard, and Corot. There are now two happening restaurantsParadis, in the new wing, and rooftop restaurant El Miradorplus an amazing design store.